DEC Special Graphics
Shift Out. | |
Alias(es) | IBM-1090 |
---|---|
Based on | ASCII |
DEC Special Graphicsboxes on the VT100 video terminal and the many emulators, and used by bulletin board software. The designation escape sequence
ESC ( 0
(hexadecimal 1B 28 30
) switched the codes for lower-case ASCII letters to draw this set, and the sequence ESC ( B
(hexadecimal 1B 28 42
) switched back.[2] IBM calls it Code page 1090.[3]
Character set
DEC Special[1][3] | ||||||||||||||||
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
5x | NBSP
| |||||||||||||||
6x | ◆
|
▒[a]
|
␉
|
␌
|
␍
|
␊
|
°
|
±
|

|
␋
|
┘
|
┐
|
┌
|
└
|
┼
|
⎺
|
7x | ⎻
|
─[b]
|
⎼
|
⎽
|
├
|
┤
|
┴
|
┬
|
│
|
≤ | ≥
|
π | ≠
|
£
|
·
|
Same as ASCII (not shown)
See also
- Box-drawing character
- DEC Multinational Character Set(MCS)
- DEC National Replacement Character Set(NRCS)
- DEC Technical Character Set
- DEC VT100
Footnotes
- ^ In IBM's system of character IDs, this is SV240000,[3] not the SF150000 which is mapped to U+2592 ▒ in other code pages such as code page 437.[4] The reference glyph for SV240000 differs in showing a chequerboard pattern[3] rather than SF150000's dithered shade.[4] U+1FB95 🮕 , in the much more recently added Symbols for Legacy Computing block, is explicitly a chequerboard shade.[5] In the specification for IBM Japanese Host code, SV240080 (i.e. SV240000 with the fullwidth attribute set) is mapped to U+25A6 ▦ ; however, the reference glyph given there for SV240080 differs from that of SV240000.[6]
- ^ The Unicode code chart for the range U+23BA through U+23BD (the scan lines before and after this character) explicitly notes that "scan line-5 is unified with the box-drawing graphic character 2500".[7]
References
- ^ a b Digital (1984). "Table 2-4: DEC Special Graphics Character Set". VT220 Programmer Reference Manual (2nd ed.).
- ^ Mascheck, Sven; Le Breton, Stefan; Hamilton, Richard L. "About the 'alternate linedrawing character set'". ~sven_mascheck/.
- ^ a b c d IBM. Code Page 01090 (PDF). Archived from the original (PDF) on 2015-07-08. Retrieved 2020-01-08.
- ^ a b IBM. Code Page 00437 (PDF). Archived from the original (PDF) on 2015-07-08.
- ^ "Symbols for Legacy Computing" (PDF). Unicode Consortium.
- ^ "IBM Japanese Graphic Character Set, Kanji: DBCS–Host and DBCS-PC" (PDF). IBM. 2002. C-H 3-3220-024 2002-11. Archived from the original (PDF) on 2020-06-02. Retrieved 2021-10-29.
- ^ "Miscellaneous Technical" (PDF). Unicode Consortium.